Just wondering have you changed the rear toe block from the stock 3 degrees to either 1 or 0 degrees? I changed mine to 1 and I can get the back end out on mine pretty easy with stock 7,000 in the front, 10,000 in the center and stock 2,000 in the rear. Mine isn't leccy but I've got a 30.5 OBR full mod in it and don't have a problem getting it side ways.
http://www.freeprawnracing.co.uk/team-fasteddy-rear-toe-block-anti-squat-brace-for-losi-5ive-sm23x.html
Might be worth a try.